blankdeluxe Posted June 12, 2013 Share Posted June 12, 2013 Getting stuff together to build some UEL headers for my leggy. I cant justify $300 for a set of single port UEL headers and I can weld so I figured I may as well save $250 bucks and build my own set. I know the stock manifold on my car has 1 5/8 tubing. I basically wanted to know if 2" is safe to use or if I should go with 1 3/4 tubing instead to keep the backpressure a little higher. I will still be running stock cats for now til I get going on the turbo build so nothing will be changing in the mid section of the pipe this time around. Just want to see what the expects think on piping size before I start burning some metal. Link to comment Share on other sites More sharing options...
pleaidestar Posted June 12, 2013 Share Posted June 12, 2013 I would mic the port itself, match the flange and tube to it, what fabrication procedures are using? Do you have access to a machine shop? Link to comment Share on other sites More sharing options...
blankdeluxe Posted June 12, 2013 Author Share Posted June 12, 2013 I would mic the port itself, match the flange and tube to it, what fabrication procedures are using? Do you have access to a machine shop? What do I need a machine shop for? I'm just bending and welding tube and welding on the flanges. Super easy to do in a garage in an afternoon. I'm just making the tube a little bigger for better flow and doing UEL to get some more rumble out of it. Link to comment Share on other sites More sharing options...
pleaidestar Posted June 12, 2013 Share Posted June 12, 2013 If it was super easy why you asking questions on how to proceed and what material sizes to use? I'm quite an expert on welding and fabrication and I like to make high quality pieces with the proper tools and procedures. Anyhow, f you are going to use the oem flanges stick to the same pipe diameter, the aftermarket way of producing those is with smooth piping and thicker flanges because of heat transfer. Borlas headers crack because they swage the flange end reducing material thickness on the welded areas. They create a bottleneck after the flange and use stainless tube which work hardens and is susceptible to deformation through the heat transfer. Link to comment Share on other sites More sharing options...
Sludgeroo Posted June 12, 2013 Share Posted June 12, 2013 Id hope you would change it for a turbo setup as you wont be able to use that mani. Id stick with oem diameter, and also make sure when you do the un equal crossover on the drivers side that you get it away more steep than not, the longer it sits with hot exhaust gases the more likelihood you'll have of eating up exhaust valves. Looking forward to the vid! (We gotta hear it somehow) Link to comment Share on other sites More sharing options...
Zues Marine Posted June 12, 2013 Share Posted June 12, 2013 i have a set of dual port heads in my garage, i aint using them Oem size or you lose backpressure and shit goes wrong Link to comment Share on other sites More sharing options...
PorkchopSandwiches Posted June 12, 2013 Share Posted June 12, 2013 I think he said he's a single porter Link to comment Share on other sites More sharing options...
Zues Marine Posted June 12, 2013 Share Posted June 12, 2013 yeah thats what im saying... just throw on dual port heads and you have way more aftermarket options Link to comment Share on other sites More sharing options...
subikid90 Posted June 12, 2013 Share Posted June 12, 2013 DO NOT USE TUBE!!! If you are making headers pick up some 1.5" sch40 stainless and have some flanges machined. The reason borlas crack is because they are made of 0.065" wall tube. -Subikid90 1997 Legacy GT 5spd & EJ251 w/EJ25D heads ~10.5CR 1998 Legacy GT Limited waiting for EJ22T hybrid swap Link to comment Share on other sites More sharing options...
pleaidestar Posted June 12, 2013 Share Posted June 12, 2013 The swaged end is 0.065 the pipe 0.085, and they don't use filler rod when they tig them either they just fuse the fillet. I have fixed a couple of jasma type headers and beefed up the welds prior to installation for those reasons. Link to comment Share on other sites More sharing options...
Sludgeroo Posted June 13, 2013 Share Posted June 13, 2013 Can't tell you how many racing beat headers my buddys and I have preventative welded. Link to comment Share on other sites More sharing options...
pleaidestar Posted June 13, 2013 Share Posted June 13, 2013 Manufacturing hasn't gotten any better even though we as a species have all this technology, seems like craftsmanship just gets worse and worse every generation. Link to comment Share on other sites More sharing options...
Sludgeroo Posted June 14, 2013 Share Posted June 14, 2013 There isn't any craftsmenship anymore and that is a problem. No more expensive parts that are worth the investment. Where are my tie rod ends with zirc fittings and heim joints? Link to comment Share on other sites More sharing options...
Zues Marine Posted June 16, 2013 Share Posted June 16, 2013 i read a study on how people in China would rather buy things manufactured in the US than their own country Link to comment Share on other sites More sharing options...
blankdeluxe Posted June 17, 2013 Author Share Posted June 17, 2013 Hence, I would rather build these myself then get them from china Link to comment Share on other sites More sharing options...
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